U0074 - Control Module Communication Bus B Off
U0074 - CONTROL MODULE COMMUNICATION BUS B OFF
| Description: This DTC is set when the controller area network (CAN) between the powertrain control module (PCM) and data link connector (DLC) is open. | |||
Possible Causes:
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| Diagnostic Aids:
The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. Network DTC concerns occur during module-to-module communication. For additional description and operation of the vehicle communication network, refer to the appropriate Module Communications Network article. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST AE . | ||